Soyasaponin Aa
Soyasaponin Aa and soyasaponin Ab dose-dependently markedly inhibit adipocyte differentiation and expression of various adipogenic marker genes, through the downregulation of the adipogenesis-related transcription factors PPARγ and C/EBPα in 3T3-L1 adipocytes.
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Soyasaponins Aa and Ab exert an anti-obesity effect in 3T3-L1 adipocytes through downregulation of PPARγ.[Pubmed:
25366162]
In this study, we investigated the effects and molecular mechanism of Soyasaponin Aa and soyasaponin Ab in regulating adipocyte differentiation and expression of adipogenic marker genes in 3T3-L1 adipocytes.
METHODS AND RESULTS:
Soyasaponin Aa and soyasaponin Ab dose-dependently inhibited the accumulation of lipids and the expression of adiponectin, adipocyte determination and differentiation factor 1/sterol regulatory element binding protein 1c, adipocyte fatty acid-binding protein 2, fatty acid synthase, and resistin in 3T3-L1 adipocytes. In addition, Soyasaponin Aa and soyasaponin Ab suppressed the transcriptional activity of peroxisome proliferator-activated receptor γ (PPARγ) in HEK 293T cells. Furthermore, we confirmed that the expression of PPARγ and of CCAAT-enhancer-binding protein α (C/EBPα) was suppressed at both the mRNA and protein levels in 3T3-L1 adipocytes by treatment with Soyasaponin Aa and soyasaponin Ab.
CONCLUSIONS:
Taken together, these findings indicate that Soyasaponin Aa and soyasaponin Ab markedly inhibit adipocyte differentiation and expression of various adipogenic marker genes through the downregulation of the adipogenesis-related transcription factors PPARγ and C/EBPα in 3T3-L1 adipocytes.
